With the increase in electricity consumption and price, energy efficiency in industrial refrigeration systems becomes an even more important issue. The performance of the industrial refrigeration system can be reported by creating energy labeling according to the energy efficiency index value. In this study, the industrial refrigeration system was evaluated in terms of energy performance with proposed a fan control technique and performed an environmentally friendly design using propane (R290) refrigerant. In addition, a new control process was developed for the management of evaporator and condenser fans, and the effect of this process on the cooled package temperatures and energy consumption was investigated. With this new technique, a 25.2% improvement was achieved in the total energy consumption of the industrial refrigeration system. It was observed that the cooled package temperatures were between −1 and +5°C throughout the experiment. The EEI value of the industrial refrigeration system has increased from class “E” to class “D” using a new control technique.
Energy labeling is performed according to the energy efficiency index (EEI) value in industrial refrigerators. In order to reduce the EEI value calculated according to the amount of energy consumed and the characteristics of the cooler, two systems were designed in this study and the energy label class of the coolers was determined according to the results obtained. Two systems were designed in this study and the energy label class of the refrigerators was determined according to the obtained results. In this study, two different refrigerators (Type 1 and Type 2) were designed, manufactured and tested. The systems are designed using R290 (propane). It is a new generation natural and environmentally friendly refrigerant with two inlet-outlet evaporators, double condensers and double compressors that provide a homogeneous refrigeration. During the experiments, temperature-pressure measurements of the cooled products and refrigeration system equipment were taken from certain points every minute and test data were recorded. In the experiments, the average air temperature and relative humidity values of the test chamber of the experiment with resistance glass in the Type 1refrigerator were measured as 25 o C and 59,09%, respectively, the average air temperature and relative humidity values of the test room of the Type 2 system experiment with antifogging film were measured as 25,231 o C and 57,207%, respectively. In the experiments, defrosting process was carried out twice a day in the refrigerators. During the experiment, the highest and lowest average temperatures of the cooled products were measured as -16,18 o C and -19,40 o C. Increasing product temperatures during defrosting and stopping cooling increased the power consumption in the system. As a result of the calculations, the energy efficiency index value of the Type 1 resistance model was calculated to be 60,53 and it was seen that the energy label was class "E". In the Type 2 model in which anti-fog coating film is used, the energy efficiency index value is 49,25 and it has been observed that the energy label is class "D".
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